Improvement in presses



UNITED STATES JAMES EooLEs, or PHILADELPHIA,

PATENT OFFICE.

PENNSYLVANIA, ASSIGNOR OF ONE- HALF HIS RIGHT TO SAMUEL EGOLES, JR., OF BALTIMORE, MI).

IMPROVEMENT IN PRESSES.

Specification forming part of Letters Patent No. 179,775, dated J 115 11, 176; application filed June 26, 1876.

To all whom, it may concern:

Be it known. that I, JAMES ECCLES, of Philadelphia, Pennsylvania, have invented Improvements in Presses, of which the following is a specification My invention relates to improvements in that class of presses in which one or more screws are used; and the object of my invention is to adopt, in connection with a press of this class, such gearing as will facilitate the operations of the platen, and certain appliances for causing the platen to shift the driving-belt. These objects I attain in the manner which I will now proceed to describe, reference being had to the accompanying drawing, which represents my invention as applied to a quadruple screw-press.

Figure 1 is a side view of my improved press;

bevel-wheel f, and at the opposite end the fast pulley 'i and loose pulleyJt, the said tubular shaft having at one end the bevel-wheel e, and at the other end the fast pulley j. Both of the bevel-wheels e and 7" gear into a like wheel, h, on a vertical driving-shaft, F, which is arranged to turn in, but is confined vertically to, a bearing, m, on the entablatu're B, the shaft passing through and being arranged to slide in a pinion, n, the hub of which turns in, but is confined vertically to, a bearing, 19, on the platen G of the press. The shaft F has a groove adapted to a key in the pinion, so that one cannot turn without the other. The pinion a gears into a bevel-wheel, g, on a shaft, H, which has its hearings on the platen G, and his shaft carries a bevel-wheel, s, gearinginto a like wheel on a shaft, I, which also has its sea-rings on the platen G. The shaft I carries two worms, J J, each of which gears into two worm-wheels, KK, the hub of each of the four wheels being arranged to turn in, but being confined vertically to, a bearingyw, on the platen, and each wheel forming the not of one of the screw-standards a.

The combination described of the platen, and its gearing for operating the nuts of the screws, with a grooved shaft, F, confined vertically to the entablature, is an important feature of my invention, as the said shaft is always in a condition for driving the said gearing, no matter what may be the position of the platen; hence the superiority of the arrangement to the plan ofdriving by a belt adapted to a pulley carried by the platen, as heretofore practiced.

One driving-belt only is required for operating the platen, the latter ascending when the belt is on the pulley j, descending when the belt is on the pulley i, and being stationary when the belt is on the intermediate or loose pulley k.

In order that the platen may be caused to shift the belt to the loose pulley when the said platen has reached a given altitude, and when it has descended to some desired point, 1 cmploy the mechanism shown in Figs. 1 and 3, in which K is a belt-shifting lever, hung to a bracket, L, on the entablature B of the press, this lever being connected by a rod, M, to an arm, N, secured to a shaft, P, which also has its bearing in the said entablature, the shaft carrying a lever, B, one arm of which is weighted, the other arm being jointed to a pendent rod, T, which passes through a bracket, U, on the platen G, the rod being provided with two adjustable collars, w 10, one above and the other below the said bracket. The shaft P carries an arm or cam, V, in the upper end of which are three notches adapted to the end of a spring, W, secured to the entablature of the press. When the end of the spring is in the middle notch of the arm the belt is on the loose pulley 7c,'as shown in Fig. 3, and 'the platen will consequently be stationary; but when the end of the spring is in the notch 00 the belt will be on the pulley j, and the platen will ascend until its bracket U strikes the upper collar 20 of the rod T, when the arm V will be moved in the direction of the arrow until its projection 31 passes the end of the spring, when the action of the latter on the inclined side of the said projection will force the arm V farther in the direction of the 211':

row.

It will thus be seen that the movement of the belt from the pulleyj to the pulley 7c is accomplished partly by the movement of the platen and partly by the action of the spring.

The platen, in descending", will be arrested when the bracket U strikes the lower collar 20 on the rod T, and moves the arm Vin a direction contrary to that pointed out by the arrow, and, aided by the spring W, causes the shifter K to move the belt from the fast pulley '5 to the loose pulley 70.

I claim as my invention- 1. The combination, in a, screw-press, of a platen, Gr, with .a driving-shaft, F, confined vertically to the entablature of the press, and arranged to slide in and turn a pinion, n. which is confined vertically to the platen, and serves,

with other gearing, as a medium for operating' the said platen, all substantially as set forth.

2. The combination of the said shaft F with the entablature B of the press, the tubular shaft D, shaft E, pulleysj k '6, and bevel-gears JAMES EGGLES.

Witnesses:

- HARRY SMITH,

HARRY HowsoN, Jr. 

